OP
Ian-LS
I'm not sure where you are getting 80% after 15 years from as all panel manufacturers have performance at 80% after 25 years so 0.8% reduction per year. A panel manufacturer (say solar world) who have 0.7% guarantee per year would mean a system producing 3600 kWh in year one would produce 3,040 kWh after 25 years at 0.7% reduction and about 2940 kWh at 0.8% reduction after 20 years.
You'll make about 100 kWh more per year using a Steca Grid inverter. Stuff like high temperature and low light performance of panels are just if not more important than 25 year performance warranty guarantees
You'll make about 100 kWh more per year using a Steca Grid inverter. Stuff like high temperature and low light performance of panels are just if not more important than 25 year performance warranty guarantees